Critical Path was the last of Buckminster Fuller's books, published shortly before his death in 1983 and summing up his lifetime of work.

Buckminster "Bucky" Fuller was an American architect, author, designer, futurist, inventor and visionary who devoted his life to answering the question "Does humanity have a chance to survive lastingly and successfully on planet Earth, and if so, how?". He is frequently referred to as a genius (albeit a slightly eccentric one).

During his lifelong experiment, Fuller wrote 29 books, coining terms such as "Spaceship Earth", "ephemeralization" and "synergetics". He also developed and contributed to a number of inventions inventions, the best known being the geodesic dome. Carbon molecules known as fullerenes (buckyballs) were so named due to their resemblance to geodesic spheres. Bucky was awarded the Presidential Medal of Freedom by Ronald Reagan in 1981.

There is no energy crisis, only a crisis of ignorance - Buckminster Fuller